Bibcode
Khachatryan, V.; Sirunyan, A. M.; Tumasyan, A.; Adam, W.; Asilar, E.; Bergauer, T.; Brandstetter, J.; Brondolin, E.; Dragicevic, M.; Erö, J.; Flechl, M.; Friedl, M.; Frühwirth, R.; Ghete, V. M.; Hartl, C.; Hörmann, N.; Hrubec, J.; Jeitler, M.; König, A.; Krätschmer, I.; Liko, D.; Matsushita, T.; Mikulec, I.; Rabady, D.; Rad, N.; Rahbaran, B.; Rohringer, H.; Schieck, J.; Strauss, J.; Treberer-Treberspurg, W.; Waltenberger, W.; Wulz, C.-E.; Mossolov, V.; Shumeiko, N.; Suarez Gonzalez, J.; Alderweireldt, S.; De Wolf, E. A.; Janssen, X.; Lauwers, J.; Van De Klundert, M.; Van Haevermaet, H.; Van Mechelen, P.; Van Remortel, N.; Van Spilbeeck, A.; Abu Zeid, S.; Blekman, F.; D'Hondt, J.; Daci, N.; De Bruyn, I.; Deroover, K.; Heracleous, N.; Lowette, S.; Moortgat, S.; Moreels, L.; Olbrechts, A.; Python, Q.; Tavernier, S.; Van Doninck, W.; Van Mulders, P.; Van Parijs, I.; Brun, H.; Caillol, C.; Clerbaux, B.; De Lentdecker, G.; Delannoy, H.; Fasanella, G.; Favart, L.; Goldouzian, R.; Grebenyuk, A.; Karapostoli, G.; Lenzi, T.; Léonard, A.; Luetic, J.; Maerschalk, T.; Marinov, A.; Randle-conde, A.; Seva, T.; Vander Velde, C.; Vanlaer, P.; Yonamine, R.; Zenoni, F.; Zhang, F.; Cimmino, A.; Cornelis, T.; Dobur, D.; Fagot, A.; Garcia, G.; Gul, M.; Poyraz, D.; Salva, S.; Schöfbeck, R.; Sharma, A.; Tytgat, M.; Van Driessche, W.; Yazgan, E.; Zaganidis, N.; Bakhshiansohi, H.; Beluffi, C.; Bondu, O.; Brochet, S. et al.
Referencia bibliográfica
Physics Letters B, Volume 765, p. 193-220.
Fecha de publicación:
2
2017
Número de citas
393
Número de citas referidas
263
Descripción
Measurements of two- and multi-particle angular correlations in pp
collisions at √{ s} = 5 , 7, and 13TeV are presented as a function
of charged-particle multiplicity. The data, corresponding to integrated
luminosities of 1.0pb-1 (5 TeV), 6.2pb-1 (7 TeV),
and 0.7pb-1 (13 TeV), were collected using the CMS detector
at the LHC. The second-order (v2) and third-order
(v3) azimuthal anisotropy harmonics of unidentified charged
particles, as well as v2 of KS0 and
Λ / Λ ‾ particles, are extracted from long-range
two-particle correlations as functions of particle multiplicity and
transverse momentum. For high-multiplicity pp events, a mass ordering is
observed for the v2 values of charged hadrons (mostly pions),
KS0, and Λ / Λ ‾, with lighter
particle species exhibiting a stronger azimuthal anisotropy signal below
pT ≈ 2GeV/ c. For 13 TeV data, the v2 signals
are also extracted from four- and six-particle correlations for the
first time in pp collisions, with comparable magnitude to those from
two-particle correlations. These observations are similar to those seen
in pPb and PbPb collisions, and support the interpretation of a
collective origin for the observed long-range correlations in
high-multiplicity pp collisions.